Devil's Tower, Devil's Tower National Monument, Wyoming, United States of America, North America

Clifford's Tower, the former Keep of York Castle, named after Roger de Clifford who was hanged there in 1322, York, Yorkshire, England, United Kingdom, Europe

Devil's Tower reflected in a stream, Devil's Tower National Monument, Wyoming, United States of America, North America

Cliffs of Moher, The Burren, County Clare, Munster, Republic of Ireland, Europe

Smeatons Tower lighthouse on The Hoe in Plymouth, Devon, England, United Kingdom, Europe

Large Governor's Tower on the right dates from 1493, Korcula Town, Korcula Island, Croatia, Europe

A monk in maroon robes holding a staff and a steel alms bowl standing in the grounds of a temple, Sittwe, Rakhine, Myanmar (Burma), Asia

Smeaton's Tower, Plymouth Hoe, Plymouth, Devon, England, United Kingdom, Europe

An actor waiting backstage before a performance of Vietnamese opera (hat boi), Vietnam, Indochina, Southeast Asia, Asia

South Stack (Ynys Lawd), an island situated just off Holy Island on the North West coast of Anglesey, Wales, United Kingdom, Europe

Two men unloading sacks of produce from a small boat in Sittwe harbour, wading through polluted water full of plastic rubbish, Sittwe, Rakhine, Myanmar (Burma), Asia

A passenger train at Lanmadaw station with train conductor waving a green flag and a passenger on the platform, Yangon (Rangoon), Myanmar (Burma), Asia

Kizkulesi (Maiden's Tower), the Bosphorus, Istanbul, Turkey, Europe

Reginald's Tower, Waterford City, County Waterford, Munster, Republic of Ireland, Europe

The keep and Constable's tower on the right, Dunstanburgh Castle, Northumberland, England, United Kingdom, Europe

King Alfred's Tower, Stourhead, Wiltshire, England, United Kingdom, Europe

Devil's Tower National Monument, Wyoming, United States of America, North America

Devil's Tower National Monument, Wyoming, United States of America, North America

Devil's Tower National Monument, Wyoming, United States of America, North America

Reginald's Tower, Waterford City, County Waterford, Munster, Republic of Ireland, Europe

Devil's Tower National Monument, Wyoming, United States of America, North America

Brian Boru Bridge and St. Patrick's Quay, Cork City, County Cork, Munster, Republic of Ireland, Europe

Devils Tower National Monument, Wyoming, United States of America, North America

Devils Tower National Monument, Wyoming, United States of America, North America

Total Lunar Eclipse, 2014

Reportage on the Jeunes Pousses, a follow-up care and pneumo-pediatric rehabilitation unit specializing in climate therapy for asthma, Briançon, France

Reportage on the Jeunes Pousses, a follow-up care and pneumo-pediatric rehabilitation unit specializing in climate therapy for asthma, Briançon, France

Reportage on the Jeunes Pousses, a follow-up care and pneumo-pediatric rehabilitation unit specializing in climate therapy for asthma, Briançon, France

Hiker, Spectra Point, Cedar Breaks National Monument, Dixie National Forest, Brian Head, Utah, USA

City view, Danube bank with historic old town, fishermens quarter, Metzgerturm and cathedral, Ulm, Baden-Wuerttemberg, Germany, Europe

Photographer Norbert Eisele-Hein at Spectra Point, Cedar Breaks National Monument, Dixie National Forest, Brian Head, Utah, USA

City view, Danube bank with historic old town, fishermens quarter, Metzgerturm and cathedral, Ulm, Baden-Wuerttemberg, Germany, Europe

Maiden's Tower, Kiz Kulesi, Golden Horn, Bosphorus, Istanbul, Turkey, Europe, Asia

Cliffs of Moher, O'Brian's Tower, Lookout Tower on the Cliffs of Moher, rocky coastline, cliffs, County Clare, Ireland, Europe

Maiden's Tower in the Bosporus, left the Blue Mosque and Hagia Sophia; from Uskudar, Istanbul, Turkey, Asia

Lighthouse, Leander's Tower or Girls' Tower, Kiz Kulesi, at sunset, island in the Bosporus, Ueskuedar, Istanbul, Turkey, Asia

Lighthouse, Leander's Tower or Girls' Tower, Kiz Kulesi, blue hour, island in the Bosporus, Ueskuedar, Istanbul, Turkey, Asia

Lighthouse, Leander's Tower or Girls' Tower, Kiz Kulesi, at sunset, island in the Bosporus, Ueskuedar, Istanbul, Turkey, Asia

Faerberturm also called Pulverturm, Gunzenhausen, Altmuehltal, Franconian Lake District, Franconia, Bavaria, Germany, Europe

O'Brian's Tower, lookout tower on Cliffs of Moher, Cliff, County Clare, Ireland, Europe

View from south east of Clifford's Tower, York, Yorkshire, England, United Kingdom, Europe

St. Michael's Tower, Glastonbury Tor, Somerset, England, United Kingdom, Europe

Troubadour's tower, Aljaferia Palace, UNESCO World Heritage Site, Zaragoza, Aragon, Spain, Europe

Presidential candidate and Democratic front runner, Barack Obama, speaks in front of huge crowd of people at a record breaking political rally in Waterfront Park, Portland, Oregon on May 18, 2008. The City of Portland Fire Department estimated crowd attendance at 72,000. It was the largest campaign rally to date for the candidate and the largest political rally in Oregon history.

Presidential candidate and Democratic front runner, Barack Obama, speaks in front of huge crowd of people at a record breaking political rally in Waterfront Park, Portland, Oregon on May 18, 2008. The City of Portland Fire Department estimated crowd attendance at 72,000. It was the largest campaign rally to date for the candidate and the largest political rally in Oregon history.

Lynne Siodmak, Brian Crowder and Evie run on the Ojai Valley Trail along the ocean in Ojai, California.

Clark College basketball player Markeith Brown slam dunks ball in Portland, Oregon.

Lynne Siodmak, Brian Crowder and Evie run on the Ojai Valley Trail along the ocean in Ojai, California.

Presidential candidate Barack Obama smiles while greeting members of the crowd following the largest political rally of the Democratic front runner's campaign to date at Waterfront Park in Portland, Oregon on May 18, 2008. City of Portland officials estimated the crowd at 72,000 people. It was the largest political rally in Oregon history.

Backcountry skier crosses glacier under late day stormy sky.

Woman ferry boat operator rows boat across river in Mekong Delta in the city of Cantho, Vietnam.

Rock climber Cassandra Riddle climbs out of the shadows while climbing at Carver, Oregon.

Brian Jonas lead climbing Trade Winds 5.12 in The Needles, California.

Working high above the busy road below, the two workers first secure the loose boulder to the cliff with a long metal pole.

Mountain ranger Brian Scheele on this way to Windy Corner on Mount McKinley, also know as Denali, in Alaska. He is pulling a sled, that together with his heavy backpack is containing all the gear like tents, clothing and food. Every climbing season High Mountain Rangers of the Denali National Park Service are called to help climbers in need. If possible the patient is brought down to Basecamp on foot, only in life threatening conditions a helicopter is called to evacuate the patient to a hospital in Anchorage. Mount McKinley, native name Denali, is the highest mountain peak in North America, with a summit elevation of 20,321 feet (6,194 m) above sea level. At some 18,000 feet (5,500 m), the base-to-peak rise is considered the largest of any mountain situated entirely above sea level. Measured by topographic prominence, it is the third most prominent peak after Mount Everest and Aconcagua. Located in the Alaska Range in the interior of the U.S. state of Alaska, McKinley is the centerpiece of Denali National Park and Preserve.

Oct 6, 2008 Mt Vernon, Washington Salmon fishing on the "Blakes Drift" section of the Skagit River with Brian Cladoosby, Chairman Swinomish Tribal Community. This kind of fishing is only allowed for the tribes, and is called drift netting where the net is cast at one side of the river and the boat crosses the river and drifts down. Catching Chums and Silvers, United States of America

Brian Metcalf Perez floats a nice jump at The Wall - Maryhill, WA, United States of America

Aerial view of skiers and snowboarders standing in lift line at Mount Hood Meadows ski resort in Oregon Cascades, United States of America

Brian Metcalf Perez floats a nice jump at The Wall - Maryhill, WA, United States of America

Aerial view of skiers and snowboarders standing in lift line at Mount Hood Meadows ski resort in Oregon Cascades, United States of America

Sept 26, 2008 Fishing offshore, Big Sur California on the MV Nikki J using the "hook and line", or "long-line" method of sustainable fishing. Crew: David Anderson & Brian Long Fishing for Black Gill Rock Fish and Sable Fish or "Black Cod". A new wave in sustainable commercial fishing is pushing fisherman to switch from higher impact methods of harvesting fish like trawling- to hook and line or long line harvest, United States of America

Oct 6, 2008 Mt Vernon, Washington Salmon fishing on the "Blakes Drift" section of the Skagit River with Brian Cladoosby, Chairman Swinomish Tribal Community. This kind of fishing is only allowed for the tribes, and is called drift netting where the net is cast at one side of the river and the boat crosses the river and drifts down. Catching Chums and Silvers, United States of America

The workers, working high above the busy road below, first secure the loose boulder to the cliff with a long metal pole.

Climber and ranger Brian Scheele is standing next to his tent and pointing to Mount Foraker from 12.000 feet camp high on Mount McKinley.

Telemark skier descends steep mountain in backcountry of southeast Alaska.

Presidential candidate and Democratic front runner, Barack Obama, speaks in front of huge crowd of people at a record breaking political rally in Waterfront Park, Portland, Oregon on May 18, 2008. The City of Portland Fire Department estimated crowd attendance at 72,000. It was the largest campaign rally to date for the candidate and the largest political rally in Oregon history.

Presidential candidate and Democratic front runner, Barack Obama, speaks in front of huge crowd of people at a record breaking political rally in Waterfront Park, Portland, Oregon on May 18, 2008. The City of Portland Fire Department estimated crowd attendance at 72,000. It was the largest campaign rally to date for the candidate and the largest political rally in Oregon history.

Woman serves beer in bar.

Male triathlete races bicycle during first annual 2007 Portland Triathlon in Portland, Oregon. The race is carbon neutral.

The worker has to be calm and pay close attention to detail while working an estimated 300ft. above the ground.

Male triathlete Tonny Saona races bicycle during first annual 2007 Portland Triathlon in Portland, Oregon. The race is carbon neutral.

Man snowboards down gentle slope in late afternoon.

Telemark skier descends steep mountain in backcountry of southeast Alaska.

A woman hiking with her backpack below Devil's Tower in Devil's Tower National Monument, Wyoming, Devils Tower, Wyoming, usa

A woman hiking with her backpack below Devil's Tower in Devil's Tower National Monument, Wyoming, Devils Tower, Wyoming, usa

Male triathlete Adam Russell races bicycle during first annual 2007 Portland Triathlon in Portland, Oregon. The race is carbon neutral.

After the helicopter has put the net into place the workers fasten the loose boulder to the cliff.

A woman trains at the coast.

Tourists ride elephants and look for tigers and rhinos in Bardia National Park, Nepal.

Man telemark skis down hill in Canada backcountry near Alaska Canada border

Brian Williams carving turns on his snowboard at Heavenly, California.

Woman runs with snowshoes in snow.

Train Station Chamonix Montenvers, Mer De Glace, Chamonix, France

Close-up view of the pyramidal spire of St Mark's Campanile behind the decorative rooftop edging of Doge's Palace in the Piazza San Marco in Venice against a blue sky, Venice, Veneto, Italy

Red fireworks in the night sky in front of the CN tower, Toronto, Ontario, Canada

View of the Lighthouse on San Giorgio Maggiore Island looking across the waterway of Bacino Di San Marco to St Mark's Campanile, St Mark's Square, Doge's Palace on and the City of Venice Island under a blue sky, Venice, Veneto, Italy

Great Grey Owl (Strix Nebulosa), Alberta Foothills, Alberta, Canada

Highway 401 looking West towards Yonge Street at dusk, Toronto, Ontario, Canada

A mother and daughter paddleboard down the stream of freshwater spring, Chiefland, Florida, United States of America

A close-up shot of the back of a live bald eagle, Homer alaska united states of america

Arctic Char Filets On Drying Racks, Arctic Ocean, Near Cambridge Bay, Nunavut, Canada

Clydesdale, The Mane Intent Equestrian Centre, Keane, Ontario, Canada

An Alpaca (Vicugna Pacos) On A Hillside In The Foothills Of The Andes Mountains Near Cusco, Peru

Bolts Of Colourful Peruvian Designs In A Street Market, These Patterns Are Part Of The Indigenous Quechua Culture, Cusco, Peru

Young Woman In Foreground, Young Man In Background, On Sailboat, Clear Lake, Riding Mountain National Park, Manitoba, Canada

Common Jackal (Canis Aureus) and Black-backed Jackal (Canis mesomelas) attack and kill a Thomson's Gazelle (Gazella thomsoni) for food; Tanzania

Wildebeest (Connochaetes taurinus) and Acacia trees (Acacia tortilis); Tanzania

Woman On Public Dock Clear Lake, Canada, Manitoba, Riding Mountain National Park

Arctic Char Filets On Drying Racks, Arctic Ocean, Near Cambridge Bay, Nunavut, Canada

Boy Sitting On The Dock With Feet In Water At Sunset, Lac Des Neiges, Quebec, Canada